Adjustable locking cover for books



M. We CUMMINGS 8a T. F. JORDAN. ADJUSTABLE LOOKING OOVBR FOR BOOKS.

(No Model.)

WI TJV' ESSES INVENTR S .dttorney UNITED STATES PATENT OFFICE.

MICHAEL W. CUMMINGS AND THOMAS FRANK JORDAN, OF OLYPHANT,

PENNSYLVANIA. v

ADJUSTABLE LOCKING COVER FOR` BOOKS.

SPECIFICATION forming part of Letters Patent No. 522,152, dated June 26,1894.

Application filed February 10, 1894. Serial No. 499.701. (No model.) v

To all whom it may concern:

Beit known-that We, MICHAEL W. OUMMINGS and THOMAS FRANK JORDAN,citizens of the United States, and residents of Olyphant, in the countyof Lackawanna and State of Penusylvania, have invented certain new anduseful Improvements in Adjustable Locking Covers for Books; and we dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to'which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

Figure l of the drawings is a plan view of the blank. Fig. 2 isa'perspective view of the cover partially folded and Fig. 3 is aperspective View of the cover ready for the book.

This invention has relation to certain new and useful improvements intemporary book covers, and it consists in the novel construction andcombination of parts, all as hereinafter described and pointed out inthe appended claims.

The object of the invention is to provide a simple, inexpensive,durable, and convenient temporary cover for books, formed Without theaid of gum, glue, mucilage, paste, stitches, or other independentfastening devices, but held in place by means of peculiarly formed lockjoints. As these joints are not dependent upon the sizeof the paper fromwhich the cover is formed, the cover is made adjustable to any booknearly corresponding with it in SlZe.

Referring to the accompanying drawings, theletter A, Fig. 1,designatesthe blank from which our improved cover is formed, said blank consistingof a rectangular piece of suitable paper. v

In making up the cover from this blank, we iirst mark folds on the lines1, 1, and 2, 2, said 4 lines being respectively at substantially thesame distance from the four edges of the blank, and extending entirelyacross said blank, the lines l, 1, being at right angles to the lines 2,2, and inclosing between them an area, which should be substantiallyequal to the area of the book to be covered. These lines divide theblank into nine divisions which may be termed and designated asfollows:-A central or body portion 3, side portions 4, 4, end portions5, 5, and four square corner portions 6. We next mark a fold diagonallyacross each corner portion on the lines 7, thus 'dividing each of saidportions into two rightangled triangles, designated by the letters a, d.We then mark a further oblique fold on the lines 8, running one fromeach juncture of the. lines l, 1, and 2, 2, to the respective edges ofthe side portions 4, 4, these last folds forming four right angledtriangles substantially corresponding in area to the triangles a, a',one of said triangles b, adjoining each of the triangles a.

Theprecise order or manner of marking out the various lines for thefolds is of course not essential. It may be conveniently done however,by first folding over the side portions of the blank to mark the linesl, l, then folding over the end portions to mark the lines 2, 2. If now,with the end portions so folded, the corner portions be folded over on acenter diagonal line, the lines 7 and 8 will be marked, and uponstraightening out 'the folds, the blank will have the appearance shownin Fig. l, and as above described. The folds being thus marked, thetriangles a are folded back against the faces of the end portions 5, 5,and the triangles b are folded back against the side portions 4, 4. Thecover at this stage is shown in Fig. 2. The side portions 4, 4, are neXtfolded down upon the body portion 3 and upon the triangles a', so thatthe triangles a. lie upon and confine the triangles a. This fold alsobrings down the end portions 5, 5, upon the side portions, the folds onthe lines 7 embracing the folds on the lines 8, and

completes the cover for application to the book. The cover so completedisI shown in Fig. 3.

To apply the cover to a book, the latter is laid upon the temporarycover and its covers are bent back toward each other and inserted intothe pockets formed bythe ends 5, the triangles a, and the body 3.

It will be observed that the cover is greatly reinforced at the cornersof the book by reason of the several thicknesses formed by theinterfolding of the triangular portions a, a',

and h, and that it is practically of double IOO thickness around theentire book, and so held that it will not slip olf in use. It will bealso apparent that, owing to the character of the joints, a cover soconstructed will iit any book nearly corresponding in size thereto. The

' blank being once cut to the proper size, no

further cutting is required.

The blanks may be manufactured with the fold lines indicated or creasedthereon, or they may be supplied to the user already folded to receivethe book.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

l. The herein described lock-joint adjustable cover for books, saidcover comprising a body portion, side portions folded over thereon, thedouble triangular portions folded under the side portions at each end,the end portions folded over upon said body and side portions, and thetriangular portions folded under the end portions and upon the sideportions, the last named triangular portions, with the ends, and bodyportion, forming pockets to receive the permanent covers of a book,substantially as specified.

2. The herein described temporary cover for books, said cover comprisinga body portion, side and end portions folded over thereon, and jointsbetween the side and end portions, such joints consisting each of twotriangular portions folded upon each other and underneath the sideportion, and a third triangular portion folded under the end portion andupon the side portion, said triangular portions being an integral partof the blank from which the cover is made, substantially as specified.

In testimony whereof we affix our signatures in presence of twoWitnesses.

MICHAEL W. CUMMINGS. THOMAS FRANK JORDAN.

Vitnesses:

JOSEPH A. DOLPHIN, CHAs. G. HITGHTER.

